5 Author: Pekka Riikonen <priikone@poseidon.pspt.fi>
7 Copyright (C) 1997 - 2001 Pekka Riikonen
9 This program is free software; you can redistribute it and/or modify
10 it under the terms of the GNU General Public License as published by
11 the Free Software Foundation; either version 2 of the License, or
12 (at your option) any later version.
14 This program is distributed in the hope that it will be useful,
15 but WITHOUT ANY WARRANTY; without even the implied warranty of
16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 GNU General Public License for more details.
22 #include "silcincludes.h"
25 /* ID lengths (in bytes) without the IP address part */
26 #define ID_SERVER_LEN_PART 4
27 #define ID_CLIENT_LEN_PART CLIENTID_HASH_LEN + 1
28 #define ID_CHANNEL_LEN_PART 4
30 /******************************************************************************
34 ******************************************************************************/
36 struct SilcIDPayloadStruct {
42 /* Parses buffer and return ID payload into payload structure */
44 SilcIDPayload silc_id_payload_parse(const unsigned char *payload,
45 SilcUInt32 payload_len)
47 SilcBufferStruct buffer;
51 SILC_LOG_DEBUG(("Parsing ID payload"));
53 silc_buffer_set(&buffer, (unsigned char *)payload, payload_len);
54 newp = silc_calloc(1, sizeof(*newp));
58 ret = silc_buffer_unformat(&buffer,
59 SILC_STR_UI_SHORT(&newp->type),
60 SILC_STR_UI_SHORT(&newp->len),
65 if (newp->type > SILC_ID_CHANNEL)
68 silc_buffer_pull(&buffer, 4);
70 if (newp->len > buffer.len - 4 || newp->len > SILC_PACKET_MAX_ID_LEN)
73 ret = silc_buffer_unformat(&buffer,
74 SILC_STR_UI_XNSTRING_ALLOC(&newp->id, newp->len),
79 silc_buffer_push(&buffer, 4);
88 /* Return the ID directly from the raw payload data. */
90 void *silc_id_payload_parse_id(const unsigned char *data, SilcUInt32 len,
93 SilcBufferStruct buffer;
96 unsigned char *id_data;
100 silc_buffer_set(&buffer, (unsigned char *)data, len);
101 ret = silc_buffer_unformat(&buffer,
102 SILC_STR_UI_SHORT(&type),
103 SILC_STR_UI_SHORT(&idlen),
108 if (type > SILC_ID_CHANNEL)
111 silc_buffer_pull(&buffer, 4);
113 if (idlen > buffer.len || idlen > SILC_PACKET_MAX_ID_LEN)
116 ret = silc_buffer_unformat(&buffer,
117 SILC_STR_UI_XNSTRING(&id_data, idlen),
122 id = silc_id_str2id(id_data, idlen, type);
130 /* Encodes ID Payload */
132 SilcBuffer silc_id_payload_encode(const void *id, SilcIdType type)
135 unsigned char *id_data;
138 id_data = silc_id_id2str(id, type);
139 len = silc_id_get_len(id, type);
140 buffer = silc_id_payload_encode_data((const unsigned char *)id_data,
146 SilcBuffer silc_id_payload_encode_data(const unsigned char *id,
147 SilcUInt32 id_len, SilcIdType type)
151 SILC_LOG_DEBUG(("Encoding %s ID payload",
152 type == SILC_ID_CLIENT ? "Client" :
153 type == SILC_ID_SERVER ? "Server" : "Channel"));
155 buffer = silc_buffer_alloc_size(4 + id_len);
158 silc_buffer_format(buffer,
159 SILC_STR_UI_SHORT(type),
160 SILC_STR_UI_SHORT(id_len),
161 SILC_STR_UI_XNSTRING(id, id_len),
166 /* Free ID Payload */
168 void silc_id_payload_free(SilcIDPayload payload)
171 silc_free(payload->id);
178 SilcIdType silc_id_payload_get_type(SilcIDPayload payload)
180 return payload ? payload->type : 0;
185 void *silc_id_payload_get_id(SilcIDPayload payload)
187 return payload ? silc_id_str2id(payload->id, payload->len,
188 payload->type) : NULL;
191 /* Get raw ID data. Data is duplicated. */
193 unsigned char *silc_id_payload_get_data(SilcIDPayload payload)
198 return silc_memdup(payload->id, payload->len);
201 /* Get length of ID */
203 SilcUInt32 silc_id_payload_get_len(SilcIDPayload payload)
205 return payload ? payload->len : 0;
208 /* Converts ID to string. */
210 unsigned char *silc_id_id2str(const void *id, SilcIdType type)
212 unsigned char *ret_id;
213 SilcServerID *server_id;
214 SilcClientID *client_id;
215 SilcChannelID *channel_id;
216 SilcUInt32 id_len = silc_id_get_len(id, type);
218 if (id_len > SILC_PACKET_MAX_ID_LEN)
223 server_id = (SilcServerID *)id;
224 ret_id = silc_calloc(id_len, sizeof(unsigned char));
227 memcpy(ret_id, server_id->ip.data, server_id->ip.data_len);
228 SILC_PUT16_MSB(server_id->port, &ret_id[server_id->ip.data_len]);
229 SILC_PUT16_MSB(server_id->rnd, &ret_id[server_id->ip.data_len + 2]);
233 client_id = (SilcClientID *)id;
234 ret_id = silc_calloc(id_len, sizeof(unsigned char));
237 memcpy(ret_id, client_id->ip.data, client_id->ip.data_len);
238 ret_id[client_id->ip.data_len] = client_id->rnd;
239 memcpy(&ret_id[client_id->ip.data_len + 1], client_id->hash,
243 case SILC_ID_CHANNEL:
244 channel_id = (SilcChannelID *)id;
245 ret_id = silc_calloc(id_len, sizeof(unsigned char));
248 memcpy(ret_id, channel_id->ip.data, channel_id->ip.data_len);
249 SILC_PUT16_MSB(channel_id->port, &ret_id[channel_id->ip.data_len]);
250 SILC_PUT16_MSB(channel_id->rnd, &ret_id[channel_id->ip.data_len + 2]);
258 /* Converts string to a ID */
260 void *silc_id_str2id(const unsigned char *id, SilcUInt32 id_len,
263 if (id_len > SILC_PACKET_MAX_ID_LEN)
269 SilcServerID *server_id;
271 if (id_len != ID_SERVER_LEN_PART + 4 &&
272 id_len != ID_SERVER_LEN_PART + 16)
275 server_id = silc_calloc(1, sizeof(*server_id));
278 memcpy(server_id->ip.data, id, (id_len > ID_SERVER_LEN_PART + 4 ?
280 server_id->ip.data_len = (id_len > ID_SERVER_LEN_PART + 4 ? 16 : 4);
281 SILC_GET16_MSB(server_id->port, &id[server_id->ip.data_len]);
282 SILC_GET16_MSB(server_id->rnd, &id[server_id->ip.data_len + 2]);
288 SilcClientID *client_id;
290 if (id_len != ID_CLIENT_LEN_PART + 4 &&
291 id_len != ID_CLIENT_LEN_PART + 16)
294 client_id = silc_calloc(1, sizeof(*client_id));
297 memcpy(client_id->ip.data, id, (id_len > ID_CLIENT_LEN_PART + 4 ?
299 client_id->ip.data_len = (id_len > ID_CLIENT_LEN_PART + 4 ? 16 : 4);
300 client_id->rnd = id[client_id->ip.data_len];
301 memcpy(client_id->hash, &id[client_id->ip.data_len + 1],
306 case SILC_ID_CHANNEL:
308 SilcChannelID *channel_id;
310 if (id_len != ID_CHANNEL_LEN_PART + 4 &&
311 id_len != ID_CHANNEL_LEN_PART + 16)
314 channel_id = silc_calloc(1, sizeof(*channel_id));
317 memcpy(channel_id->ip.data, id, (id_len > ID_CHANNEL_LEN_PART + 4 ?
319 channel_id->ip.data_len = (id_len > ID_CHANNEL_LEN_PART + 4 ? 16 : 4);
320 SILC_GET16_MSB(channel_id->port, &id[channel_id->ip.data_len]);
321 SILC_GET16_MSB(channel_id->rnd, &id[channel_id->ip.data_len + 2]);
330 /* Returns length of the ID */
332 SilcUInt32 silc_id_get_len(const void *id, SilcIdType type)
337 SilcServerID *server_id = (SilcServerID *)id;
338 return ID_SERVER_LEN_PART + server_id->ip.data_len;
343 SilcClientID *client_id = (SilcClientID *)id;
344 return ID_CLIENT_LEN_PART + client_id->ip.data_len;
347 case SILC_ID_CHANNEL:
349 SilcChannelID *channel_id = (SilcChannelID *)id;
350 return ID_CHANNEL_LEN_PART + channel_id->ip.data_len;
358 /* Duplicate ID data */
360 void *silc_id_dup(const void *id, SilcIdType type)
365 SilcServerID *server_id = (SilcServerID *)id;
366 return silc_memdup(server_id, sizeof(*server_id));
371 SilcClientID *client_id = (SilcClientID *)id;
372 return silc_memdup(client_id, sizeof(*client_id));
375 case SILC_ID_CHANNEL:
377 SilcChannelID *channel_id = (SilcChannelID *)id;
378 return silc_memdup(channel_id, sizeof(*channel_id));